@Docedison:hey, i am asking because i am interested in what process these capasitors make an influance.these are not capasitors i am complaining about. i am currently follow an engerirings education (first year) and was asking you guys with this example. i just wanted the capasitors bieng explained so i can use this explanation to further develop my knowlege about capacitors.

thank you all for your replies, ill take a dive into the accasable information on the web, and use your explaition as a guidence.i am not fully understanding the capasitors processes, but i have some more grip on why they are there.

Rule #1: Always ALWAYS read and honor the datasheetRule #2: Trust but verify someone else's design unless it comes from a manufacturers datasheetRule #3: Always question: "Why did some person do this in this design?"

Regarding #1: The best way to start understanding datasheets is to read them yourself. The more you read them... the more they stop seeming like gibberish.

Regarding #2: Just because you can find an example "on the internet" doesn't not make it right or "best practice". Having a circuit work "most of the time" should never be an end goal. A good design is one that was created to work under all reasonably possible conditions.

Regarding #3: If you are not questioning why a designer did something, you are not learning... BUT sometimes hearing the "because we said so" is the easiest answer from the more experienced.

I agree with all of that. I had been falling into the habit of finding a design on the web, and assuming that the person knew what they were doing. But what if they didn't? What if they left out something vital, like a capacitor because it "seemed to work"?

So your best bet is to use the datasheet as a primary reference, and use other people's designs as an aid in understanding.

Please post technical questions on the forum, not by personal message. Thanks!

So your best bet is to use the datasheet as a primary reference, and use other people's designs as an aid in understanding.

Yes, but even then some things are just a "given." Looking at datasheet schematics, it's assumed the user knows some basic things. i.e. common sense

For example, an opamp schematic in a datasheet may not even show the power supply pins.... much less show that bypass caps are connected on the same V+ and V- pins. -- it's assumed the user knows and will do so.

It's also assumed the user will connect such bypass caps as close as possible to the IC pins, and not a few inches away. Again, it's a "given/common sense" that datasheets dont need to mention.